Examine source code of LASER CAT

{
  "manifest_version": 2,
  "name": "LASER CAT",
  "short_name": "LASER CAT",
  "description": "IT'S A LASER CAT!",
  "version": "23.0.1",
  "background": {
    "scripts": [
      "js/launcher.js"
    ]
  },
  "browser_action": {
    "default_icon": {
      "16": "icons/icon-16.png",
      "64": "icons/icon-64.png",
      "96": "icons/icon-96.png",
      "128": "icons/icon-128.png"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "*://*/*"
      ],
      "js": [
        "js/lasercat.js"
      ]
    }
  ],
  "icons": {
    "16": "icons/icon-16.png",
    "64": "icons/icon-64.png",
    "96": "icons/icon-96.png",
    "128": "icons/icon-128.png"
  },
  "web_accessible_resources": [
    "images/cat-body.png",
    "images/cat-head.png",
    "sounds/laser-loop.mp3",
    "sounds/laser-start.mp3",
    "sounds/meow.mp3"
  ],
  "permissions": [
    "activeTab",
    "*://*/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "lasercat-xgreer@example.com",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "collects_website_data": false,
        "collects_interaction_data": false,
        "collects_error_data": false
      }
    }
  }
}